Magnetic latching relay

Abstract

The utility model provides a magnetic latching relay, and belongs to the technical field of relays. The technical problem that an existing magnetic latching relay is low in verification efficiency is solved. A magnetic latching relay comprises an electromagnetic system and a contact system, the electromagnetic system comprises a coil iron core assembly, a yoke assembly and an armature assembly, the yoke assembly comprises a first yoke and a second yoke which are asymmetrically arranged, the first yoke and the second yoke are fixedly connected to the two ends of the coil iron core assembly respectively, and the armature assembly is rotatably fixed to a base. The two ends of the armature assembly are in limiting swing contact with the first yoke and the second yoke respectively. According to the utility model, the asymmetrically arranged yoke assemblies and the staggered stepped armature assembly are adopted, so that the magnetic latching relay has enough holding force and reversing force to complete the change of the opening and closing states of the static contact and the movable contact, a debugging-free verification structure is formed, and the verification efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of relay technology, and specifically refers to a magnetic latching relay. Background Technology

[0002] A magnetic latching relay is a new type of relay that, like other relays, automatically connects and disconnects circuits. Unlike ordinary relays, which require continuous energization of the coil to maintain their current contact state, the magnetic latching relay's contacts are held open or closed by the magnetic force generated by a permanent magnet. When the relay contacts need to be open or closed, a positive (or negative) DC pulse voltage is applied to the coil, and the relay instantly completes the open / close state transition. When the magnetic latching relay contacts are in the held state, the coil does not need to be continuously energized; the magnetic force of the permanent magnet is sufficient to maintain the relay's state. Currently, in the verification process of magnetic latching relays after production, the anchor point is typically moved after energization to break the balance and ensure sufficient holding and commutating forces to change the contact state. This results in low verification efficiency for magnetic latching relays. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a magnetic latching relay, thereby solving the technical problem of low verification efficiency in existing magnetic latching relays.

[0004] The objective of this utility model can be achieved through the following technical solution: A magnetic latching relay, comprising an electromagnetic system and a contact system, wherein the electromagnetic system comprises a coil core assembly, a yoke assembly and an armature assembly, the yoke assembly comprises two asymmetrically arranged yokes, yoke one and yoke two, which are respectively fixedly connected to the two ends of the coil core assembly, and the armature assembly is rotatably fixed on the base, with the two ends of the armature assembly forming a limiting swing contact with yoke one and yoke two respectively.

[0005] Furthermore, yoke one and yoke two are right-angled bends. Yoke one includes a vertical part one and a horizontal part one, and yoke two includes a vertical part two and a horizontal part two. The vertical part one and vertical part two are respectively fixed at both ends of the coil core assembly. The length of the horizontal part two is greater than the length of the horizontal part one.

[0006] Furthermore, the armature assembly includes a permanent magnet and a magnet, with the ends of the first and second horizontal portions respectively located within the opposing permanent magnets. The permanent magnets have a stepped portion on the side closest to the first and second horizontal portions. The permanent magnets can be a symmetrical pair or two pairs, embedded within the magnets and fixed together by injection molding.

[0007] Furthermore, the step portion has two pairs, and the first step surface of the step portion is an inclined surface. When the armature assembly swings, the first step surface will abut against the horizontal portion one and the horizontal portion two.

[0008] Furthermore, the armature assembly includes an integrally formed outer shell and a swing arm, with rotating shafts protruding from both sides of the outer shell, and a clamping plate fixed on the base, the rotating shafts being rotatably fixed to the base and the clamping plate.

[0009] Furthermore, the swing arm is located on the same side as the horizontal part two.

[0010] Furthermore, the contact system includes a moving contact, a stationary contact, and a spring plate. The spring plate and the rocker arm are respectively connected to the two ends of the push plate. The base has a guide groove, and the push plate is located in the guide groove.

[0011] Furthermore, the pushing plate includes an upper pushing groove and a lower pushing groove, one end of the spring plate is located in the upper pushing groove, and the rocker arm is located in the lower pushing groove.

[0012] Furthermore, the spring sheet includes a stationary spring sheet and a moving spring sheet that are stacked on top of each other. The end of the stationary spring sheet and the moving spring sheet that are stacked close together is fixed on the first connecting piece. The elastic end of the stationary spring sheet and the moving spring sheet is located in the upper pushing groove. The side of the upper pushing groove that is close to the moving spring sheet is the contact surface, and the contact surface is an inclined surface. The moving contact is fixed on the stationary spring sheet, and the stationary contact is fixed on the second connecting piece. The first connecting piece and the second connecting piece are fixed on the base.

[0013] Furthermore, the stationary spring has a U-shaped part one and a fixed part in the middle, and the moving spring has a U-shaped part two and a bifurcated elastic part in the middle. The U-shaped part two is located below the U-shaped part one, and the bifurcated elastic part is located below the fixed part. One end of the bifurcated elastic part and the fixed part are both located in the upper push groove.

[0014] Compared with the prior art, the technical effects of this utility model are as follows: First, by setting the lengths of the first horizontal part and the second horizontal part to be different, the first yoke and the second yoke are set asymmetrically. The asymmetrically set yoke assembly has an asymmetrical torsional force that forces the armature assembly to swing and come into contact with the first horizontal part and the second horizontal part to form a current loop. This allows the magnetic latching relay to have sufficient holding force and commutation force to complete the change of the opening and closing states of the static and moving contacts, forming a calibration structure that does not require debugging, improving calibration efficiency and reducing labor costs. 2. The permanent magnet and the magnetic steel are fixed together by injection molding, and the outer shell and the swing arm are formed by injection molding. The swing arm and the second horizontal part are located on the same side. The permanent magnets symmetrically protrude from both sides of the magnetic steel. There is a receiving space between a pair of permanent magnets on the same side. One end of the first horizontal part and the second horizontal part are located in the receiving space on both sides and can abut against the permanent magnets when they swing to a certain position. The side of the permanent magnet close to the first horizontal part and the second horizontal part has a stepped part. The first step surface of the stepped part is an inclined surface. The armature assembly with this staggered stepped form can enable the magnetic latching relay to have sufficient holding force and commutation force parameters, forming a structure that does not require debugging and verification. Attached Figure Description

[0015] Figure 1 This is a perspective view of the utility model.

[0016] Figure 2 This is a front view of the electromagnetic system and contact system of this utility model.

[0017] Figure 3 This is a perspective view of the electromagnetic system and part of the contact system of this utility model.

[0018] Figure 4 This is a perspective view of the base of this utility model.

[0019] Figure 5 This is a perspective view of the base, clamping plate, and armature assembly of this utility model.

[0020] Reference numerals: 1. Coil core assembly; 2. Yoke 1; 201. Vertical part 1; 202. Horizontal part 1; 3. Yoke 2; 301. Vertical part 2; 302. Horizontal part 2; 4. Base; 401. Guide groove; 5. Armature assembly; 501. Permanent magnet; 5011. Stepped part; 502. Outer shell; 5021. Rotating shaft; 503. Swing rod; 6. Push plate; 601. Upper push groove; 6011. Contact surface; 602. Lower push groove; 7. Clamping plate; 8. Moving contact; 9. Stationary contact; 10. Spring plate; 101. Stationary spring plate; 1011. U-shaped part 1; 1012. Fixing part; 102. Moving spring plate; 1021. U-shaped part 2; 1022. Forked elastic part; 11. Connecting plate 1. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] according to Figures 1 to 5 As shown, a magnetic latching relay includes a base 4, an electromagnetic system, and a contact system. The electromagnetic system includes a coil core assembly 1, a yoke assembly, and an armature assembly 5. The coil core assembly 1 includes an iron core, a coil wound around the iron core, and a bracket that fixes the iron core. The yoke assembly includes two asymmetrically arranged yokes 2 and 3, which are respectively fixedly connected to the two ends of the coil core assembly 1. The armature assembly 5 is rotatably fixed to the base 4, and its two ends form limiting swing contacts with yokes 2 and 3, respectively. That is, when the armature assembly 5 swings relative to the base 4, it will abut against yokes 2 and 3. The armature assembly 5 includes a permanent magnet 501 and a magnet steel, a housing 502 that encapsulates the permanent magnet 501 and the magnet steel through injection molding, and an integrally molded swing arm 503. Since the magnet steel is encapsulated within the housing 502, it is not marked in the accompanying drawings. The permanent magnets 501 can be a symmetrical pair or two pairs, embedded within the magnet steel and fixed together by injection molding. The permanent magnets 501 are located on both sides of the housing 502, and the swing arm 503 is aligned with one of the permanent magnets 501 on one side.

[0024] Yoke 1 2 and yoke 2 3 are right-angled bends. Yoke 1 2 includes a vertical portion 201 and a horizontal portion 202, and yoke 2 3 includes a vertical portion 301 and a horizontal portion 302. Vertical portions 201 and 301 are fixed to both ends of the coil core assembly 1, and the length of horizontal portion 302 is greater than that of horizontal portion 202. The ends of horizontal portions 202 and 302 are located in oppositely arranged permanent magnets 501. The oppositely arranged permanent magnets 501 have a receiving space. One end of each horizontal portion 202 and 302 is located within the receiving space on either side and can abut against the permanent magnets 501 when it swings to a certain position. The side of the permanent magnet 501 closest to horizontal portions 202 and 302 has a stepped portion 5011. The step portion 5011 has two pairs. The first step surface of the step portion 5011 is an inclined surface. When the armature assembly 5 swings, the first step surface will abut against the horizontal portion 202 and the horizontal portion 302. The swing arm 503 is located on the same side as the horizontal portion 302.

[0025] The armature assembly 5 has a rotating shaft 5021 protruding from both sides of the outer shell 502. A clamping plate 7 is fixed on the base 4. The base 4 and the clamping plate 7 have rotating holes. The rotating shaft 5021 is rotated and fixed on the base 4 and the clamping plate 7 through the rotating holes.

[0026] The contact system includes a moving contact 8, a stationary contact 9, and a spring plate 10. The spring plate 10 and the rocker arm 503 are respectively connected to the two ends of the push plate 6. The base 4 has a guide groove 401, and the push plate 6 is located in the guide groove 401. The push plate 6 can move up and down within the guide groove 401 by being pushed by the rocker arm 503 and the spring plate 10. The push plate 6 includes an upper push groove 601 and a lower push groove 602. One end of the spring plate 10 is located in the upper push groove 601, and the rocker arm 503 is located in the lower push groove 602.

[0027] The spring sheet 10 includes a stationary spring sheet 101 and a movable spring sheet 102 that are stacked on top of each other. The end of the stationary spring sheet 101 and the movable spring sheet 102 that are stacked and close together is fixed on the connecting piece 11. The elastic end of the stationary spring sheet 101 and the movable spring sheet 102 is located in the upper push groove 601. The side of the upper push groove 601 that is close to the movable spring sheet 102 is the contact surface 6011. The contact surface 6011 is an inclined surface. The movable contact 8 is fixed on the stationary spring sheet 101, and the stationary contact 9 is fixed on the connecting piece 2. The connecting piece 11 and the connecting piece 2 are fixed on the base 4. The stationary spring 101 has a U-shaped part 1011 and a fixed part 1012 in the middle, and the movable spring 102 has a U-shaped part 2 1021 and a bifurcated elastic part 1022 in the middle. The U-shaped part 2 1021 is located below the U-shaped part 1011, and the bifurcated elastic part 1022 is located below the fixed part 1012. One end of the bifurcated elastic part 1022 and the fixed part 1012 are both located in the upper push groove 601.

[0028] By setting the lengths of the horizontal section 202 and the horizontal section 302 to be different, the yoke 1 2 and the yoke 2 3 are set asymmetrically. The asymmetrical yoke assembly has an asymmetrical torsional force that forces the armature assembly 5 to swing and come into contact with the horizontal section 202 and the horizontal section 302 to form a current loop. The asymmetrical yoke assembly and the armature assembly 5 with the staggered stepped form enable the magnetic latching relay to have sufficient holding force and commutation force to complete the change of the opening and closing state of the stationary contact 9 and the moving contact 8, forming a test structure that does not require debugging, improving test efficiency and reducing labor costs.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A magnetic latching relay, comprising an electromagnetic system and a contact system, said electromagnetic system comprising a coil core assembly (1), a yoke assembly, and an armature assembly (5), characterized in that: The yoke assembly includes two asymmetrically arranged yokes, yoke 1 (2) and yoke 2 (3), which are fixedly connected to the two ends of the coil core assembly (1). The armature assembly (5) is rotatably fixed on the base (4), and the two ends of the armature assembly (5) form a limiting swing contact with yoke 1 (2) and yoke 2 (3) respectively.

2. A magnetic latching relay according to claim 1, characterized in that: The first yoke (2) and the second yoke (3) are right-angled bends. The first yoke (2) includes a vertical part (201) and a horizontal part (202). The second yoke (3) includes a vertical part (301) and a horizontal part (302). The vertical part (201) and the vertical part (301) are respectively fixed at both ends of the coil core assembly (1). The length of the horizontal part (302) is greater than the length of the horizontal part (202).

3. A magnetic latching relay according to claim 2, characterized in that: The armature assembly (5) includes a permanent magnet (501) and a magnet. The ends of the first horizontal part (202) and the second horizontal part (302) are respectively located in the oppositely arranged permanent magnet (501). The permanent magnet (501) has a stepped part (5011) on the side near the first horizontal part (202) and the second horizontal part (302).

4. A magnetic latching relay according to claim 3, characterized in that: The step portion (5011) has two pairs. The first step surface (5011a) of the step portion (5011) is an inclined surface. When the armature assembly (5) swings, the first step surface (5011a) will abut against the horizontal part one (202) and the horizontal part two (302).

5. A magnetic latching relay according to claim 4, characterized in that: The armature assembly (5) includes an integrally formed outer shell (502) and a swing arm (503). The outer shell (502) has a rotating shaft (5021) protruding on both sides. A clamping plate (7) is fixed on the base (4). The rotating shaft (5021) is rotatably fixed on the base (4) and the clamping plate (7).

6. A magnetic latching relay according to claim 5, characterized in that: The swing arm (503) is located on the same side as the horizontal part (302).

7. A magnetic latching relay according to claim 5 or 6, characterized in that: The contact system includes a moving contact (8), a stationary contact (9) and a spring plate (10). The spring plate (10) and the rocker arm (503) are respectively connected to the two ends of the push plate (6). The base (4) has a guide groove (401) and the push plate (6) is located in the guide groove (401).

8. A magnetic latching relay according to claim 7, characterized in that: The push plate (6) includes an upper push groove (601) and a lower push groove (602). One end of the spring plate (10) is located in the upper push groove (601), and the rocker arm (503) is located in the lower push groove (602).

9. A magnetic latching relay according to claim 8, characterized in that: The spring sheet (10) includes a stationary spring sheet (101) and a moving spring sheet (102) that are stacked together. The end of the stationary spring sheet (101) and the moving spring sheet (102) that are stacked close together is fixed on the first connecting piece (11). The elastic end of the stationary spring sheet (101) and the moving spring sheet (102) is located in the upper pushing groove (601). The side of the upper pushing groove (601) that is close to the moving spring sheet (102) is the contact surface (6011). The contact surface (6011) is an inclined surface. The moving contact (8) is fixed on the stationary spring sheet (101). The stationary contact (9) is fixed on the second connecting piece (12). The first connecting piece (11) and the second connecting piece (12) are fixed on the base (4).

10. A magnetic latching relay according to claim 9, characterized in that: The stationary spring (101) has a U-shaped part one (1011) and a fixed part (1012) in the middle, and the moving spring (102) has a U-shaped part two (1021) and a bifurcated elastic part (1022) in the middle. The U-shaped part two (1021) is located below the U-shaped part one (1011), and the bifurcated elastic part (1022) is located below the fixed part (1012). One end of the bifurcated elastic part (1022) and the fixed part (1012) are both located in the upper push groove (601).

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